I'm afraid I burned myself out on Skyrim.
after maxing my main character I sort of just stopped playing, like completely.
I couldn't find the motivation to finish the primary quest chain even though I finished virtually all faction quests.
I'll take a look at Dawnguard, but something tells me it won't change anything.
this is exactly what happened to me with Borderlands.
I played the shit out of Borderlands for like 3 months and then suddenly I just stopped dead in my tracks and never touched it again. it's like suddenly the combat and gameplay just became so repetitive that no matter what kind of weapons or gear I had - and no matter what kind of quest I was on - everything started to feel the same.
and when everything starts to feel the same, you feel like you're doing nothing at all. I'm not sure how DLC is going to change this for Skyrim